There is currently a bug with the +15str to wep where it grants no parry. I've made loads of tickets about it and they acknowledge the problem and its on their to do list, bla-de-bla same old story with everything.
^^^^^^^DISREGARD^^^^^^^
On topic I'd go with sader for the heal & AP & Parry youll get when it procs. Allowing you a better defense against hunters pets and a quicker way of downing them.
Edit: Just logged my warrior and equipped 15 str wep and it seems it is now giving a tiny amount of parry. Who knows, they must have "fixed" it. I gain 1.42% parry from 17 str @ lvl 19. (i.e. when i switch crusader enchanted wingblade to 15str butchers slicer I gain 1.42% parry.)
Nice to know this is now working, the 15str to wep ench has had a history of being a little buggy though.